Does adjuvant alpha-interferon improve outcome when combined with total skin irradiation for mycosis fungoides?

D Roberge1, T Muanza, G Blake

  • 1Department of Radiation Oncology and Division of Hematology, Department of Medicine, McGill University Health Centre, Montreal, Quebec H3G 1A4, Canada. david.roberge@muhc.mcgill.ca

Abstract

Insights

Adjuvant alpha-interferon (IFN) combined with total skin electron irradiation (TSEI) for mycosis fungoides (MF) is feasible. However, adding IFN did not improve complete response rates, disease-free survival, or overall survival in MF patients.

Area of Science:

  • Oncology
  • Dermatology

Background:

  • Mycosis fungoides (MF) frequently recurs after total skin electron irradiation (TSEI).
  • Adjuvant therapies may reduce MF recurrence rates.
  • Alpha-interferon (IFN) is a potential adjuvant therapy for MF.

Purpose of the Study:

  • To evaluate the efficacy of adjuvant alpha-interferon (IFN) combined with total skin electron irradiation (TSEI) in mycosis fungoides (MF) treatment.
  • To review the McGill University's experience with this combined therapeutic approach.

Main Methods:

  • A retrospective review of 50 mycosis fungoides (MF) patients treated between 1990 and 2000.
  • Patients received either total skin electron irradiation (TSEI) alone (31 patients) or TSEI plus adjuvant alpha-interferon (IFN) (19 patients).
  • IFN was administered subcutaneously prior to, during, and for 12 months after TSEI.

Main Results:

  • All patients achieved a response to treatment.
  • Complete response (CR) rates were 65% for TSEI alone and 58% for TSEI + IFN (P=0.6).
  • Median overall survival (OS) was 61 months for TSEI alone versus 38 months for TSEI + IFN (P=0.4).
  • Acute dermatitis (Grade II-III) occurred in all patients.
  • Fever, chills, or myalgia were reported in 32% of patients receiving IFN.

Conclusions:

  • Concurrent alpha-interferon (IFN) and total skin electron irradiation (TSEI) is a feasible treatment for mycosis fungoides (MF).
  • The addition of IFN to TSEI did not significantly improve complete response rates, disease-free survival, or overall survival.
  • Toxicity associated with combined therapy was acceptable.

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